Chemical information JB4701

2009-02-19View Original

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I would like to ask my seniors, I study mechanics and work in a chemical plant. In the past, the flange standard we used was JB1158-82. Now everyone uses JB4701-92. Is there any difference? That friend has the JB4701-92 standard. Can you share it? Thank you.

Reply #22009-02-19

It seems that there is JB4701-2000. I wonder if 92 will be scrapped?

Reply #32009-02-19

http://bbs.hcbbs.com/thread-2736-1-8.html

Reply #42009-02-19

The above standards have all been scrapped long ago. Now the pipe flange standard uses HG20592~20635-97, and the equipment flange standard uses JBT4700~07-2000. These two standards will also be released in new versions as relevant material standards change. Please pay attention at any time.

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Chemical information JB4701

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